How Can I Get Available System Memory in C /g Across Different Platforms?

Accessing Available Memory in C /g Across Multiple Platforms

Determining the available memory on a system is crucial for memory management tasks in computing. This article will guide you through platform-independent methods to retrieve available memory information using C /g .

Retrieving Available Memory

For UNIX-like operating systems, the sysconf() function provides information about system parameters, including physical memory. The following code snippet demonstrates how to obtain total physical memory using sysconf():

#include <unistd.h>

unsigned long long getTotalSystemMemory()
{
    long pages = sysconf(_SC_PHYS_PAGES);
    long page_size = sysconf(_SC_PAGE_SIZE);
    return pages * page_size;
}

On Windows systems, the GlobalMemoryStatusEx() function can be used to retrieve various memory status information, including total physical memory. Here's the code:

#include <windows.h>

unsigned long long getTotalSystemMemory()
{
    MEMORYSTATUSEX status;
    status.dwLength = sizeof(status);
    GlobalMemoryStatusEx(&amp;status);
    return status.ullTotalPhys;
}

Platform-Independent Implementation

To make the code platform-independent, you can use conditional compilation:

#ifdef UNIX
// Use sysconf() for UNIX-like systems
#elif defined(WIN32)
// Use GlobalMemoryStatusEx() for Windows
#else
// Handle other platforms if necessary
#endif

By combining the two methods, you can seamlessly retrieve available memory across multiple platforms in your C /g applications.

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